Breathing Style: Breathing of the Green Flash $\rightarrow$ Breathing of One For All Weapon: Reinforced steel-toed Nichirin greaves and gauntlets. Lore: Born without the spiritual aptitude to handle Breathing Styles, Midoriya was taken in by the retired Sun Hashira, Toshinori Yagi. His initial attempts at Total Concentration Breathing broke his own lungs and ribs due to improper force control. He eventually mastered a style that channels explosive kinetic force through his entire body simultaneously (Full Cowl), leaving trails of emerald lightning in his wake.

Title: The Blast Hashira Breathing Style: Spark Breathing (Derived from Flame and Wind) Weapon: Custom dual Nichirin broadswords designed to generate massive kinetic friction when struck together. Lore: Aggressive and wildly talented, Bakugo ignites the air currents around his blades using high-pressure breathing techniques. His ultimate technique, Howitzer Impact, creates a vacuum vortex that ignites into a devastating heat wave, turning nearby low-level demons to ash instantly.

Title: The Twin-Element Hashira Breathing Style: Breathing of Embers and Ice (A hybrid of Flame and Water Breathing) Weapon: A dual-toned Nichirin katana—the right side of the blade stays perpetually frosted, while the left runs red-hot. Lore: Son of the strict Flame Hashira, Enji Todoroki (Endeavor), Shoto was forced to train in pure Flame Breathing until he rebelled, developing his own complementary icy style. He strikes with a combination of freezing defensive parries and explosive heat slashes, perfectly balancing the temperature of his body.

Title: Demon Slayer (Tsuguko rank) Breathing Style: Breathing of Gravity (Derived from Wind Breathing) Weapon: A lightweight Nichirin shortsword tethered to a weighted hook and line. Lore: Uraraka manipulates air pressure and footwork to make her body feel nearly weightless, allowing her to sprint along trees and vertical surfaces. Her strikes disorient demons by disrupting their balance, leaving them suspended in mid-air before she delivers a decisive decapitating swing.

Title: The Former Sun Hashira / Symbol of Peace Breathing Style: Breathing of the Golden Sun Lore: A legendary swordsman who fought the progenitor of all Demons, All For One, to a standstill years ago. The battle left him with a severe internal injury that severely limits his breathing capacity. In short bursts, he can activate Total Concentration: Constant to regain his towering muscle form, delivering strikes like the United States of Smash that level entire forests.

All For One (The Progenitor): A thousand-year-old demon who grows stronger by devouring Hashira and assimilating their unique Breathing Styles into dark Demon Blood Arts.

Tomura Shigaraki (Upper Rank One): Possesses the Demon Blood Art Disintegration. Anything his flesh or blood touches turns to dust, creeping through solid ground to destroy entire Demon Slayer estates from a distance.

Dabi (Upper Rank Two): A demon whose flesh burns with blue flames hotter than standard solar heat, making him nearly impossible for Nichirin blades to approach without melting.